/// <summary>
/// Checks whether there are any looping requireements based on looping threshold and enhances
/// the sequence accordingly. Applies only for INCREMENT and DECREMENT field modification types
/// </summary>
/// <param name="pucls"></param>
/// <param name="p"></param>
private void CheckNEnhanceForLooping(PersistentUncoveredLocationStore pucls,
int fitnessval, FieldModificationType fmt, SafeList <Field> culpritFields)
{
if (fmt != FieldModificationType.INCREMENT && fmt != FieldModificationType.DECREMENT)
{
return;
}
//Not even a single execution happened on this location.
if (fitnessval == Int32.MaxValue)
{
return;
}
var field = culpritFields[0];
FieldStore fs;
if (!this.pmd.FieldDictionary.TryGetValue(field, out fs))
{
return;
}
Dictionary <string, Method> writeMethods = new Dictionary <string, Method>();
foreach (var mset in fs.WriteMethods.Values)
{
foreach (var m in mset)
{
var sig = MethodOrFieldAnalyzer.GetMethodSignature(m);
writeMethods.Add(sig, m);
}
}
foreach (var seq in pucls.SuggestedMethodSequences)
{
string loop_method;
if (!this.IsEligibleForLooping(seq, field, writeMethods, fs, out loop_method))
{
continue;
}
pucls.LoopingFeatureApplied = true;
this.host.Log.LogWarning(WikiTopics.MissingWikiTopic, "LoopingFeature",
"Applying looping feature on method: " + loop_method + " (" + (fitnessval - 1) + ")");
for (int count = 1; count < fitnessval; count++)
{
seq.Sequence.Add(loop_method);
}
}
}
/// <summary>
/// Check whether a previously uncovered location is covered now in this run
/// </summary>
public bool IsPrevUncoveredLocationCovered(PersistentUncoveredLocationStore pucls)
{
//retrieve the method
MethodDefinition associatedMethod;
if (!MethodOrFieldAnalyzer.TryGetMethodDefinition(this, pucls.AssemblyShortName, pucls.declaringTypeStr,
pucls.MethodSignature, out associatedMethod))
{
this.Log.LogWarning(WikiTopics.MissingWikiTopic, "serialization",
"Failed to retrieve the method with signature " + pucls.MethodSignature);
return(false);
}
//Check whether the offset is covered in this method
if (this.IsBranchOffsetCoveredInMethod(associatedMethod, pucls.Offset))
{
return(true);
}
return(false);
}
/// <summary>
/// Targets to remove those sequences with low or the same fitness
/// </summary>
/// <param name="ucovLocList"></param>
/// <param name="persistentUncoveredLocationStore"></param>
private void RemoveSuggestionsWithLowFitness(UncoveredCodeLocationStoreList ucovLocList,
PersistentUncoveredLocationStore pucls, List <MethodSignatureSequence> putspecificsequences)
{
pucls.NumberOfUnsuccessfulAttempts++;
int bestFitness = pucls.Fitnessvalue;
foreach (var ucovloc in ucovLocList.StoreList)
{
if (ucovloc.Fitnessvalue < bestFitness)
{
bestFitness = ucovloc.Fitnessvalue;
}
}
var explorableType = ucovLocList.ExplorableType;
var tempSuggestedSequences = new List <MethodSignatureSequence>();
tempSuggestedSequences.AddRange(pucls.SuggestedMethodSequences);
//remove those suggestions that have lower fitness values
foreach (var ucovloc in ucovLocList.StoreList)
{
//Get matching sequence from pucls
MethodSignatureSequence matchingseq;
if (!FactorySuggestionStore.TryGetMatchingSequence(ucovloc.MethodCallSequence, tempSuggestedSequences, out matchingseq))
{
//This sequence is not there in our suggested sequence. This should have happened
//due to the case that it came from other uncovered location stores, and is helping
//the current store.
if (ucovloc.Fitnessvalue <= bestFitness)
{
var mss = new MethodSignatureSequence();
foreach (var methodinucov in ucovloc.MethodCallSequence.Sequence)
{
if (methodinucov.Contains("..ctor(")) //Don't add constructors
{
continue;
}
if (!methodinucov.Contains(explorableType)) //Ignore the method calls from other types
{
continue;
}
mss.Sequence.Add(methodinucov);
}
if (mss.Sequence.Count > 0)
{
pucls.SuggestedMethodSequences.Add(mss);
}
}
continue;
}
tempSuggestedSequences.Remove(matchingseq);
if (ucovloc.Fitnessvalue > bestFitness)
{
//Previous sequence is of no use as it is leading to higher fitness value
pucls.SuggestedMethodSequences.Remove(matchingseq);
}
}
if (tempSuggestedSequences.Count != 0)
{
//Not all sequences are assigned fitness values. Raise warnings for other sequences
this.Log.LogWarning(WikiTopics.MissingWikiTopic, "sequencematching",
"Fitness values are not available for some previous sequences, Needs to handle this case!!!");
//Remove those suggestions whose fitness value is not evaluated at all. Ideally
//this case should not happen. Needs additional debugging.
//foreach (var seq in tempSuggestedSequences)
// pucls.SuggestedMethodSequences.Remove(seq);
}
//Update the previous fitness value with the current. If there is any improvement in the fitness, reset the number
//of unsuccessful attempts
if (pucls.Fitnessvalue != bestFitness)
{
pucls.NumberOfUnsuccessfulAttempts = 0;
pucls.Fitnessvalue = bestFitness;
}
}
